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公开(公告)号：AT179002T
公开(公告)日：1999-04-15
申请号：AT92110130
申请日：1992-06-16
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , FREDERICKS KENNETH JAMES SR , HEFFERON EUGENE PAUL , MERITT ALLAN SAMUEL , MOFFITT GERALD THOMAS
Abstract: A method for acquiring the node identifier of a node in a data processing input/output (I/O) system having a plurality of nodes. This procedure is part of the initialization of each node in the I/O system and may be used to establish the configuration of the I/O system such that if a connection breaks or a fault occurs between nodes, the configuration can be confirmed after the break or fault is corrected. This prevents data from being sent to the wrong device if lines were connected in a different configuration during the correction of a fault. The node identifier is a worldwide-unique identifier such that only one node is identified by a node identifier. The node identifier contains a validity code that specifies if the node identifier is valid. Also disclosed is a retry procedure for retrying the acquisition of a node identifier if the acquired node identifier is not valid, and a deferral procedure which defers the retry procedure if a link is not available.
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公开(公告)号：DE69122013T2
公开(公告)日：1997-03-13
申请号：DE69122013
申请日：1991-06-18
Applicant: IBM
Inventor： ELLIOTT JOSEPH CHARLES , HEFFERON EUGENE PAUL , MERITT ALLAN SAMUEL , SACHS MARTIN WILLIAM , SNEDAKER MARK CARL
Abstract: In a computer I/O system including a plurality of link-level facilities and a dynamic switch (10) having a plurality of ports (P), each link-level facility being attached to an individual one of the ports (P), a mechanism and method for assigning a unique link level address to each of the link-level facilities. As each of the link-level facilities comes on line, it sends an acquire link address (ALA) frame and waits for a response (ACK) frame. The ALA frame may be addressed to a general to-whom-it-may-concern address and have a source address of who-am-I. Only a dynamic switch (10) normally assigns link addresses. When receiving (110) an ALA frame, the dynamic switch returns (115) an ACK frame having a unique link address assigned to the sender of the ALA frame. Provision is made for determining if there is a dynamic switch present, or, if the link-level facilities are connected together by a static connection through the dynamic switch, for the link-level facility of a channel to assign the unique link addresses.
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公开(公告)号：MX9204928A
公开(公告)日：1993-03-01
申请号：MX9204928
申请日：1992-08-26
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , FREDERICKS KENNETH JAMES , HEFFERON EUGENE PAUL , MOFFIT GERALD THOMAS , MERITT ALLAN SAMUEL
Abstract: A method for acquiring the node identifier of a node in a data processing input/output (I/O) system having a plurality of nodes. This procedure is part of the initialization of each node in the I/O system and may be used to establish the configuration of the I/O system such that if a connection breaks or a fault occurs between nodes, the configuration can be confirmed after the break or fault is corrected. This prevents data from being sent to the wrong device if lines were connected in a different configuration during the correction of a fault. The node identifier is a worldwide-unique identifier such that only one node is identified by a node identifier. The node identifier contains a validity code that specifies if the node identifier is valid. Also disclosed is a retry procedure for retrying the acquisition of a node identifier if the acquired node identifier is not valid, and a deferral procedure which defers the retry procedure if a link is not available.
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公开(公告)号：DE69228904T2
公开(公告)日：1999-11-25
申请号：DE69228904
申请日：1992-06-16
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , FREDERICKS KENNETH JAMES , HEFFERON EUGENE PAUL , MERITT ALLAN SAMUEL , MOFFITT GERALD THOMAS
Abstract: A method for acquiring the node identifier of a node in a data processing input/output (I/O) system having a plurality of nodes. This procedure is part of the initialization of each node in the I/O system and may be used to establish the configuration of the I/O system such that if a connection breaks or a fault occurs between nodes, the configuration can be confirmed after the break or fault is corrected. This prevents data from being sent to the wrong device if lines were connected in a different configuration during the correction of a fault. The node identifier is a worldwide-unique identifier such that only one node is identified by a node identifier. The node identifier contains a validity code that specifies if the node identifier is valid. Also disclosed is a retry procedure for retrying the acquisition of a node identifier if the acquired node identifier is not valid, and a deferral procedure which defers the retry procedure if a link is not available.
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Patent Agency Ranking
公开(公告)号：DE69228904D1
公开(公告)日：1999-05-20
申请号：DE69228904
申请日：1992-06-16
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , FREDERICKS KENNETH JAMES , HEFFERON EUGENE PAUL , MERITT ALLAN SAMUEL , MOFFITT GERALD THOMAS
Abstract: A method for acquiring the node identifier of a node in a data processing input/output (I/O) system having a plurality of nodes. This procedure is part of the initialization of each node in the I/O system and may be used to establish the configuration of the I/O system such that if a connection breaks or a fault occurs between nodes, the configuration can be confirmed after the break or fault is corrected. This prevents data from being sent to the wrong device if lines were connected in a different configuration during the correction of a fault. The node identifier is a worldwide-unique identifier such that only one node is identified by a node identifier. The node identifier contains a validity code that specifies if the node identifier is valid. Also disclosed is a retry procedure for retrying the acquisition of a node identifier if the acquired node identifier is not valid, and a deferral procedure which defers the retry procedure if a link is not available.
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公开(公告)号：DE69122013D1
公开(公告)日：1996-10-17
申请号：DE69122013
申请日：1991-06-18
Applicant: IBM
Inventor： ELLIOTT JOSEPH CHARLES , HEFFERON EUGENE PAUL , MERITT ALLAN SAMUEL , SACHS MARTIN WILLIAM , SNEDAKER MARK CARL
Abstract: In a computer I/O system including a plurality of link-level facilities and a dynamic switch (10) having a plurality of ports (P), each link-level facility being attached to an individual one of the ports (P), a mechanism and method for assigning a unique link level address to each of the link-level facilities. As each of the link-level facilities comes on line, it sends an acquire link address (ALA) frame and waits for a response (ACK) frame. The ALA frame may be addressed to a general to-whom-it-may-concern address and have a source address of who-am-I. Only a dynamic switch (10) normally assigns link addresses. When receiving (110) an ALA frame, the dynamic switch returns (115) an ACK frame having a unique link address assigned to the sender of the ALA frame. Provision is made for determining if there is a dynamic switch present, or, if the link-level facilities are connected together by a static connection through the dynamic switch, for the link-level facility of a channel to assign the unique link addresses.
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公开(公告)号：DE69312589T2
公开(公告)日：1998-02-19
申请号：DE69312589
申请日：1993-05-07
Applicant: IBM
Inventor： BRICE FRANK WILLIAM , ELLIOTT JOSEPH CHARLES , FREDERICKS KENNETH JAMES , GALBRAITH ROBERT EDWARD , HALMA MARTEN JAN , HOUGH ROGER ELDRED , JOHN SUZANNE MARIE , MALINOWSKI PAUL ANTHONY , MERITT ALLAN SAMUEL , OAKES KENNETH JAMES , RATHJEN JOHN CORD , SACHS MARTIN WILLIAM , STUCKI DAVID EMMETT , WYMAN LESLIE WOOD
Abstract: Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), and control units (CUs). The invention provides image identifiers (IIDs) for assigning resources to the different OSs. Each shared I/O resource has a sharing set of control blocks (CBs) in which a respective CB is assigned to (and located by) a respective IID of one of the OSs. Each of the CBs in a sharing set provides a different image of the same I/O resource. The different CB images are independently set to different states by I/O operations for the different OSs, so that the OSs can independently share the same I/O resource.
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公开(公告)号：DE69312589D1
公开(公告)日：1997-09-04
申请号：DE69312589
申请日：1993-05-07
Applicant: IBM
Inventor： BRICE FRANK WILLIAM , ELLIOTT JOSEPH CHARLES , FREDERICKS KENNETH JAMES , GALBRAITH ROBERT EDWARD , HALMA MARTEN JAN , HOUGH ROGER ELDRED , JOHN SUZANNE MARIE , MALINOWSKI PAUL ANTHONY , MERITT ALLAN SAMUEL , OAKES KENNETH JAMES , RATHJEN JOHN CORD , SACHS MARTIN WILLIAM , STUCKI DAVID EMMETT , WYMAN LESLIE WOOD
Abstract: Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), and control units (CUs). The invention provides image identifiers (IIDs) for assigning resources to the different OSs. Each shared I/O resource has a sharing set of control blocks (CBs) in which a respective CB is assigned to (and located by) a respective IID of one of the OSs. Each of the CBs in a sharing set provides a different image of the same I/O resource. The different CB images are independently set to different states by I/O operations for the different OSs, so that the OSs can independently share the same I/O resource.
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公开(公告)号：DE3479768D1
公开(公告)日：1989-10-19
申请号：DE3479768
申请日：1984-09-28
Applicant: IBM
Inventor： GUYETTE RICHARD ROLAND , HALL EDDIE THOMAS , MERITT ALLAN SAMUEL , NEWSON STEPHEN RICHARD , SCALZI CASPAR ANTHONY , SEARS GLENN WARREN
Abstract: A multiprocessing (MP) method is described for executing on plural CPUs of the MP a uniprocessor system (UPS) program not written to run on a MP system. Separate copies of the UPS are provided in the shared main storage (MS) of the MP. A hypervisor type of control program (called a partitioned multiprocessing system, PMP) uses the MP method to enable simultaneous execution of the plural copies of a UPS on different CPUs of the MP as UPS guest virtual machines. PMP can dedicate any CPU to the sole execution of a particular copy of UPS. The copies of the UPS run on the different CPUs independently of each other, but they may share I/O devices. PMP may run with a virtual machine (VM) type of job entry and task dispatching control-programming system designed to operate on CPUs having 370-XA architecture and to use emulation on the CPUs to permit a UPS designed for the same or another architecture (e.g. S/360 or S/370) to execute on the 370-XA CPUs as a UPS guest by using an emulation instruction (e g. start interpretive execution, SIE). Efficient direct I/O handling for the executing UPS copies (i.e. UPS guests) requires the MS boundary of each UPS to be located at a different 2 byte absolute address, so that the I/O processor can easily translate channel program and I/O data addresses used by each UPS to the actual absolute MS addresses of the MP, n being the number of bits in the effective address used by the UPS. Zone parameters are derived from the 2 boundary addresses for the respective guests. This channel translation does not require any translation tables and can avoid a MS access for each translation. A CPU may use segment and page tables to translate UPS addresses for any UPS guest's CPU requests.
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